Now shipping — join 8,400+ students & engineers

The calculator
that sees
your problem

Snap a photo of any equation — handwritten, textbook, or whiteboard. Nexus Calc reads it, solves it, and shows every step in under a second.

Nexus Calc Calculator
See how it works
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Trusted by 8,400+ students & engineers worldwide

Solves problems across every subject
Algebra Calculus Trigonometry Statistics Physics Chemistry Geometry Linear Algebra Differential Equations Number Theory
AI Provider Settings
1 connected
Anthropic
claude-sonnet-4-5 · Active
Connected
OpenAI
gpt-4o, o1, o3-mini
+ Add key
Google Gemini
gemini-2.0-flash, gemini-pro
+ Add key
Custom endpoint
Any OpenAI-compatible API
+ Add key
⚿  Keys are stored on-device only — never sent to Nexus servers.
Custom AI

Bring your
own AI brain.

Nexus Calc's camera handles the hard part. But the intelligence behind it? That's up to you. Upload any API key and run the AI model of your choice — directly on your device.

Your model, your rules
Run GPT-4o, Claude Sonnet, Gemini Flash, or any OpenAI-compatible endpoint. Switch models mid-session without losing history.
Keys stay on the device
API keys are encrypted and stored locally on your Nexus Calc. They are never transmitted to our servers — your credentials stay yours.
No rate limit surprises
Use your own subscription tier. Whether you're on a free tier or a high-volume plan, Nexus Calc works within your existing limits.
Compare across models
Snap the same problem and run it through multiple providers side by side. See which model explains the method most clearly for you.
Capabilities

Point the camera. Get the answer. See every step.

Snap any equation instantly

The built-in 5MP mini camera reads handwritten notes, printed textbooks, and whiteboard diagrams. No typing required — just aim and press.

Ready to snap

Solved in under a second

AI processing via hotspot or Wi-Fi. Results appear on screen the moment you snap.

0.8s
Avg solve time
99.4%
Accuracy
100%
Offline

Sync to your laptop

Export full solution sets via USB or Bluetooth. PDF, CSV, or plain text — your format, your workflow.

Wide-angle FOV

The 70° FOV lens captures textbook pages and whiteboards clearly in a single frame — nothing gets cut off.

70° FOV

Step-by-step on screen

Every solution broken into numbered steps — so you understand the method, not just the answer.

01
Identify: Definite integral, power rule
02
Apply: ∫x² dx = x³/3 + C
03
Evaluate: [x³/3]₀¹ = 1/3 − 0
04
Answer: 1/3 ≈ 0.333
How it works

Aim. Snap. Done.

01
Aim & snap

Point the built-in camera at any problem — handwritten notes, textbook pages, or a whiteboard — and press the snap button. It works at any angle.

02
AI reads & solves

The AI identifies the problem type, selects the right method, and computes the full solution with step-by-step working — requires an internet connection via hotspot or Wi-Fi.

03
Answer on screen

Results appear directly on the TI-84's stock screen. The answer and full step-by-step working show up exactly where you'd expect — no extra hardware, no separate display.

Get Yours

One calculator.
Every answer.

Nexus Calc
The AI
Calculator

Point the camera. Get the answer. Every step shown — algebra, calculus, chemistry, physics. No subscription ever.

Camera
5MP · 70° FOV
Connectivity
Bluetooth 5.3
AI Models
On-device + Cloud
Battery
3-week standby
Storage
Unlimited history
Power
Rechargeable AAA batteries
Watch full demo
In stock · 40 units remaining

All sales are final — we do not offer refunds. Delivery timelines are estimates only; we cannot guarantee arrival by a specific date but will do our best to get your order to you as quickly as possible.

One-time price
$249
No subscription. No recurring fees.
Yours forever.
Nexus Calc device + carry case
5MP AI camera module
Cloud AI — requires hotspot or Wi-Fi
Cloud AI with custom API key support
Bluetooth sync + USB-C cable
Lifetime software updates
Priority support included

Stop copying equations
by hand. Just snap.

Join 8,400+ students and engineers who've already made the switch. Ships in 2–3 business days.

Watch demo